Krowne Metal 28-174S casters are designed for 1-1/4" square post shelving, featuring locking wheels for stability. Each caster has a 5" diameter and supports a load capacity of 220 lbs, making them ideal for heavy-duty use. These grease-resistant casters elevate your equipment by 6 inches, ensuring easy access and mobility. They are compatible with Cambro Camshelving® plastic shelving and come in a set of four for complete shelving solutions.